xend: No IP forwarding on Fedora 16

[W. Michael Petullo]

I am having a strange problem on Fedora 16. I am trying to figure out
what is going on, but have not yet been successful.

I am using Xen with routed interfaces instead of bridged (i.e., vif-script
vif-route). In this case, the "network-route" script should enable kernel
port forwarding. However, this is not the case---at least the first time
xend runs. Xend runs, but /proc/sys/net/ipv4/ip_forward still contains
"0".

But, if I restart xend by hand using "service xend restart", then kernel
IP forwarding gets turned on.

At first I thought this may be due to SELinux (perhaps systemd starts xend
in a different context than a root shell does). But this is not the case;
I get the same behavior when I boot with SELinux in permissive mode.

Does anyone else know what might be causing this?

[Tom Horsley]

On Tue, 15 Nov 2011 14:09:31 -0600
W. Michael Petullo wrote:
> Does anyone else know what might be causing this?

I have lots of problems with random "network stuff" not
working at boot now that systemd is starting everything.
I've taken to putting lines like this in /etc/rc.d/rc.local

/bin/bash -c 'sleep 5 ; service ypbind restart' > /dev/null 2>&1 < /dev/null &
/bin/bash -c 'sleep 10 ; service nscd restart' > /dev/null 2>&1 < /dev/null &